rs754497897

Variant names:

• chrX-111685070-A-T
• rs754497897
• NM_001099922.3:c.350A>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4 BS1_Supporting

The NM_001099922.3(ALG13):​c.350A>T​(p.His117Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000638 in 1,097,014 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.0000064 (0 hom. 1 hem.)
• Consequence: ALG13 NM_001099922.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 6.74
• Publications: 0 publications found

Genes affected

ALG13 (HGNC:30881): (ALG13 UDP-N-acetylglucosaminyltransferase subunit) The protein encoded by this gene is a subunit of a bipartite UDP-N-acetylglucosamine transferase. It heterodimerizes with asparagine-linked glycosylation 14 homolog to form a functional UDP-GlcNAc glycosyltransferase that catalyzes the second sugar addition of the highly conserved oligosaccharide precursor in endoplasmic reticulum N-linked glycosylation. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2009]

ALG13 Gene-Disease associations (from GenCC):

• genetic developmental and epileptic encephalopathy

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• developmental and epileptic encephalopathy, 36

  Inheritance: XL Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
• non-syndromic X-linked intellectual disability

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.40860718).
• BS1: Variant frequency is greater than expected in population amr. GnomAdExome4 allele frequency = 0.00000638 (7/1097014) while in subpopulation AMR AF = 0.000201 (7/34908). AF 95% confidence interval is 0.000094. There are 0 homozygotes in GnomAdExome4. There are 1 alleles in the male GnomAdExome4 subpopulation. Median coverage is 29. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001099922.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALG13	NM_001099922.3	MANE Select	c.350A>T	p.His117Leu	missense	Exon 3 of 27	NP_001093392.1
	ALG13	NM_001257231.2		c.116A>T	p.His39Leu	missense	Exon 3 of 27	NP_001244160.1
	ALG13	NM_001324292.2		c.350A>T	p.His117Leu	missense	Exon 3 of 26	NP_001311221.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALG13	ENST00000394780.8	TSL:2 MANE Select	c.350A>T	p.His117Leu	missense	Exon 3 of 27	ENSP00000378260.3
	ALG13	ENST00000371979.7	TSL:1	c.350A>T	p.His117Leu	missense	Exon 3 of 4	ENSP00000361047.3
	ALG13	ENST00000623622.2	TSL:5	c.350A>T	p.His117Leu	missense	Exon 3 of 24	ENSP00000485624.2

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD2 exomes AF: 0.0000386 AC: 7 AN: 181415 AF XY: 0.0000152

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000261

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000638 AC: 7 AN: 1097014 Hom.: 0 Cov.: 29 AF XY: 0.00000276 AC XY: 1 AN XY: 362418

African (AFR) AF: 0.00 AC: 0 AN: 26348

American (AMR) AF: 0.000201 AC: 7 AN: 34908

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19343

East Asian (EAS) AF: 0.00 AC: 0 AN: 30176

South Asian (SAS) AF: 0.00 AC: 0 AN: 53925

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40516

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4127

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 841622

Other (OTH) AF: 0.00 AC: 0 AN: 46049

GnomAD4 genome Cov.: 23

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ExAC AF: 0.0000247 AC: 3

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Developmental and epileptic encephalopathy, 36 (1)
-	1	-	Inborn genetic diseases (1)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.33
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.12
CADD	Benign	23
DANN	Benign	0.97
DEOGEN2	Benign	0.29	T
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.93	D
M_CAP	Pathogenic	0.44	D
MetaRNN	Benign	0.41	T
MetaSVM	Benign	-0.29	T
PhyloP100		6.7
PrimateAI	Uncertain	0.50	T
PROVEAN	Pathogenic	-6.8	D
REVEL	Uncertain	0.30
Sift	Benign	0.057	T
Sift4G	Benign	0.42	T
Polyphen		0.13	B
Vest4		0.54
MutPred		0.42		Loss of disorder (P = 0.0582)
MVP		0.87
MPC		0.41
ClinPred		0.34	T
GERP RS		6.2
Varity_R		0.64
gMVP		0.46
Mutation Taster		=89/11	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs754497897; hg19: chrX-110928298;